Data and code from: Species interactions amplify functional group responses to elevated CO2 and N enrichment in a 24-year grassland experiment

Plant functional groups differ in their response to global changes, although species within those groups also vary in such responses. Both species and functional group responses to global change are likely influenced by species interactions such as inter-specific competition and facilitation, which are prevalent in species mixtures but not monocultures. As most studies focus on responses of plants growing in either monocultures or mixtures, but rarely both, it remains unclear how interspecific interactions in diverse ecological communities, especially among species in different functional groups, modify functional group responses to global changes. To address these issues, we leveraged data from a 16-species, 24-year perennial grassland experiment to examine plant functional group biomass responses to atmospheric CO2, and N inputs at different planted diversity. Functional groups differed in their responses to N and CO2 treatments in monocultures. Such differences were amplified in mixt..., From the manuscript:
Experiment design: The BioCON experiment, which manipulates Biodiversity, N and CO2, was started in 1997 at Cedar Creek Ecosystem Science Reserve (East Bethel, MN, USA, 45°40′N, 93°18′W), a Long-Term Ecological Research site. The compositionally neutral full-factorial experiment comprised 296 plots that varied in their initial planted diversity (1,4, 9 or 16 species), N (ambient or + 4 g m-2 year-1) and CO2 (ambient or +180ppm) treatments applied in a split-plot design for the CO2 treatment (Reich, Knops, et al., 2001). The diversity gradient was created by experimentally assembling plant communities with 1 species, random selection of 4 or 9 species and/or all 16 species. As 36 of the 9 species plots have since been used for a sub-experiment involving temperature and drought treatments, we excluded those plots from our analyses leaving 260 plots. The species were chosen to represent common or naturalized prairie species in the region and spanned four functional gro..., , # Data and code from: Species interactions amplify functional group responses to elevated CO2 and N enrichment in a 24-year grassland experiment

[https://doi.org/10.5061/dryad.9zw3r22q5](https://doi.org/10.5061/dryad.9zw3r22q5)

## Description of the data and file structure

### Data and code for \"Species interactions amplify functional group responses to elevated CO2 and N enrichment in a 24-year grassland experiment\"

This contains data on species-specific biomass and cover from a long-term biodiversity global change experiment situated at Cedar Creek Ecosyste Science Reserve, Minnesota, USA. The three main treatments are Biodiversity gradient (1, 4, 9 and 16 species), nitrogen treatment (ambient vs +4 g/m2/yr) and CO2 treatment (ambient vs +180 ppm). The experiment was planted in 1997 and data are available from 1997-2021. Data on other aspects of the experiment may be available as part of other papers. More details about the experiment can be found at [https://cedarcreek.umn.edu/re...